I know you hate to hear it, but I think it might be time for an upgrade. The video card you have is about 6 years old. Not only that, but it's an entry level version of the card, which means it wasn't even meant for gaming in the first place, especially half a decade into the future.
Also, you didn't list your processor.
I think if you have lowered and disabled most of the options and you still can't get it to run smoothly, you might be out of luck. Just because it runs on OpenGL doesn't mean it will run on any machine, it's a new game and you're not going to be able to play with that PC forever
I know it sucks to hear it, but I was in the same boat. Tweaking and lowering until it was playable. I finally broke down and saved up enough for a decent computer and I'm glad I did. Not only are games playable, they also don't look like mushroom soup mixed with vomit.
For what it's worth, I think it's rude to assume someone else's financial situation and I apologize if I do offend by suggesting an upgrade, but I used to have that card in this old computer I had. It's the reason I upgraded XD